Symptoms

Priapism causes abnormally persistent erections not related to sexual stimulation. Priapism symptoms may vary depending on the type of priapism. There are two main types: ischemic and nonischemic priapism.

Ischemic priapism

Ischemic, also called low-flow, priapism is the result of blood not being able to leave the penis. It's the more common type of priapism. Signs and symptoms include:

Unwanted erection lasting more than four hours

Unwanted erection off and on for several hours (stuttering priapism)

Rigid penile shaft, but usually soft tip of penis (glans)

Usually painful or tender penis

Nonischemic priapism

Nonischemic, or high-flow, priapism occurs when too much blood flows into the penis. Nonischemic priapism is usually painless. Signs and symptoms include:

Unwanted erection lasting at least four hours

Erect but not rigid penile shaft

When to see a doctor

If you have an erection lasting longer than four hours, go to the emergency room. If you experience a painful, persistent erection that resolves on its own in less than four hours, see your doctor. You may need treatment to prevent further episodes.

AUA guideline on the management of priapism. Linthicum, Md.: American Urological Association Education and Research Inc. http://www.auanet.org/content/guidelines-and-quality-care/clinical-guidelines.cfm?sub=priapism. Accessed March 14, 2013.

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